Tracey Antonelli and her husband, Patrick Mooty, first adopted Emilene, who is now 3 and a half. But they are unable to get 2-year-old Rosalie's visa and passport because of a lockdown at the American consulate.

The consulate has been closed since Monday because a staff member opened up an envelope with a suspicious white powder.

"Apparently, the white powder went all over their clothes or the computer or something like that, so they locked down the building," Antonelli said.

The children both have a rare life-threatening blood disorder -- beta thalassemia major -- that requires regular blood transfusions. Emmy is scheduled for a transfusion next Wednesday.

Antonelli requested children with the disease because she suffers from a milder form of it.

"There's just a lot of anxiety for everybody. Just being here, being away, coming to China to adopt a child is absolutely not a vacation," she said.

Grandparents in Arlington are feeling the stress, too.

"I'm just a nana, but I'm a concerned nana right now. I'm concerned about my own baby. Tracy is my baby, and I'm concerned about her, too," Cheryl Antonelli said.

"We don't even know what the end game is here now. That is very stressful," Ralph Antonelli said.

The Antonellis said they were scheduled to pick up Tracy and her family at Logan International Airport Wednesday at midnight. Now, they say they don't know when that joyous reunion will be.